scholarly journals Income and Population Dynamics in Deprived Neighbourhoods: Measuring the Poverty Turnover Rate Using Administrative Data

2017 ◽  
Vol 12 (2) ◽  
pp. 275-300 ◽  
Author(s):  
Mark Fransham
Keyword(s):  
Population Dynamics ◽  
Administrative Data ◽  
Turnover Rate ◽  
Deprived Neighbourhoods

Population Dynamics of an Estuarine-Dependent Fish, the Spot (Leiostomus xanthurus), ASong a Tidal Creek–Seagrass Meadow Coenocline

1983 ◽  
Vol 40 (10) ◽  
pp. 1633-1638 ◽  
Author(s):  
Michael P. Weinstein
Keyword(s):  
Population Dynamics ◽  
Decay Rate ◽  
Turnover Rate ◽  
Total Population ◽  
Seagrass Meadow ◽  
Tidal Creek ◽  
Leiostomus Xanthurus ◽  
Population Turnover ◽  
Young Of The Year ◽  
Average Individual

To study the population dynamics of young-of-the-year spot (Leiostomus xanthurus) I released 6981 marked fish midway up the tidal creek portion of a small (<20 ha) marsh creek–seagrass meadow coenocline. Holding mortality experiments (96 h) indicated that 61.5%, or 4300 individuals, survived the marking process to constitute the population available for recapture. Over a 90-d study period, 212 marked fishes were recaptured. From plots of the ratio of marked to unmarked individuals in subsequent samples, I concluded that the population was resident in the creek for up to 182 d with the average individual present for 91 d. When this population turnover rate was compared to the total population decay rate (marked plus unmarked fish), the exchange between habitats (immigration/emigration) accounted for about 26% of the total decay rate, with the remainder attributed to natural mortality. By correcting the overall disappearance rate for population turnover due to immigration/emigration, and using this adjusted value as a measure of instantaneous mortality (Z), the estimated production in this population was 21.8 kcal (91342 J)∙m−2∙d−1. This figure is over six times greater than previously reported values for this species for all size classes over the entire growing season.

Population dynamics of the harvested clam Anomalocardia brasiliana (Bivalvia: Veneridae) in Cidade Beach, south-east Brazil

2015 ◽  
Vol 95 (6) ◽  
pp. 1183-1191 ◽  
Author(s):  
Guilherme Nascimento Corte ◽  
Leonardo Querobim Yokoyama ◽  
Ross A. Coleman ◽  
A. Cecília Z. Amaral
Keyword(s):  
Population Dynamics ◽  
West Indies ◽  
Turnover Rate ◽  
Sandy Beach ◽  
Limiting Factors ◽  
Fishery Resource ◽  
The Sustainable Development ◽  
Eastern Brazil ◽  
Density And Biomass

Knowledge of the population dynamics and productivity of exploited species is essential to achieve the sustainable development of fisheries, and to ensure sustainable, long-term use of these resources. The venerid clam Anomalocardia brasiliana is harvested as a fishery resource from the French West Indies to Brazil. Yet, the exploitation of this species is not backed by management or regulations based on scientific knowledge. This can result in reduced (or even depleted) A. brasiliana density and biomass. Here, we examined the population dynamics of A. brasiliana over the course of 1 year at Cidade Beach, a sheltered sandy beach located in south-eastern Brazil. Sampling was done monthly from March 2007 to February 2008. The sampled population was predominantly juvenile. Growth and recruitment were continuous, indicating no major fluctuation in limiting factors, such as temperature, salinity and food. Nevertheless, the abundance and the turnover rate (P/B ratio) of A. brasiliana at Cidade were much smaller than the values observed in other areas of occurrence. The mortality was more intense in young individuals, and the peak of individual production occurred in individuals with a 25 mm shell length, suggesting that individuals smaller than this size should not be exploited.

scholarly journals Child Welfare Inequalities in a Time of Rising Numbers of Children Entering Out-of-Home Care

2019 ◽  
Vol 50 (2) ◽  
pp. 581-597 ◽  
Author(s):  
Martin Elliott
Keyword(s):  
Child Welfare ◽  
Child Maltreatment ◽  
Home Care ◽  
Administrative Data ◽  
Social Gradient ◽  
Deprived Neighbourhoods ◽  
Out Of Home Care ◽  
Cent Increase ◽  
The Relationship ◽  
Over Time

Abstract The relationship between poverty and child maltreatment and by extension of being placed in out-of-home care is a well-established one. However, this study goes beyond recent UK studies on the scale of child welfare inequalities in the likelihood of being placed in out-of-home care by considering such inequalities over time. The study is an analysis of longitudinal administrative data on children ‘looked after’ with a specific focus on children entering care in the two years that followed the death of Peter Connelly in 2007, a period that saw a rapid increase in numbers of children entering care. The analysis considers these increases using a child welfare inequalities lens. There is a ‘social gradient’ present within the overall rates of children entering care, with children in the most deprived neighbourhoods almost twelve times more likely to enter care than those in the least deprived. Such inequalities are compounded further in times of rapidly increasing entries to care with children entering care being disproportionately drawn from the poorest neighbourhoods, illustrated by a 42-per cent increase in rates between the two years in the most deprived neighbourhoods whilst rates in the least deprived neighbourhoods fell or remained the same.

Fibrinopeptide A (FPA) Level and Fibrinogen Kinetics in Patients with Malignant Disease

1981 ◽  
Vol 46 (04) ◽  
pp. 706-709 ◽  
Author(s):  
Yasuhiro Yoda ◽  
Tsukasa Abe
Keyword(s):  
Fibrinolytic Activity ◽  
Turnover Rate ◽  
Malignant Disease ◽  
Major Determinant ◽  
Fibrinopeptide A

SummaryFPA level, fibrinogen turnover rate, and fibrinolytic activity were studied on 18 patients with malignant disease. It was found that the FPA levels were significantly elevated and were correlated with fibrinogen turnover rate (r=0.74, p<0.001) and FDP (r = 0.58, p<0.02). Estimated FPA turnover rate was also correlated with fibrinogen turnover rate (r = 0.70, p<0.001). These results suggest that fibrinogen catabolism in patients with malignant disease is related with thrombin proteolysis. However, ratios of 1/2 FPA turnover rate to fibrinogen turnover rate suggest that intravascular thrombin proteolysis is not the major determinant of fibrinogen catabolism. It is suspected that extravascular thrombin proteolysis is responsible for the elevation of plasma FPA level which is correlated with acceleration of fibrinogen catabolism.

Sign in / Sign up

Export Citation Format

Share Document